SLVSF66A August 2019 – December 2019 DRV8874
PRODUCTION DATA.
In the alternative application example, the device is configured to drive a unidirectional current through two external loads (such as two brushed DC motors) using a dual half-bridge configuration. The duty cycle of each half-bridge is controlled with a PWM resource from the external controller to the EN/IN1 and PH/IN2 pins. The device is configured for the independent half-bridge control mode by leaving the PMODE pin floating. Since the current regulation scheme is disabled in the independent half-bridge control mode, the VREF pin is tied to VCC. The combined load current is monitored with an ADC from the controller to detect the voltage across RIPROPI.
Figure 33. Typical Application Schematic